stick spectra

例句：

1. 1. The spectrometeris used to analyze the chemical composition ofsamples.
   分光计用于分析样品的化学成分。
2. 2.The absorption spectrum of a gas is usedto determine its temperature.
   气体的吸收光谱用于确定其温度。
3. 3. The spectrum of the staris visible from Earth due to its brightness.
   由于其亮度，恒星的光谱可以从地球上看到。